Optional:
Torque Arm
Fan Cover Mounting Kit
C-Face Mounting Kits
Clean machine shaft of any dirt and check for any burrs or damage.
Install the anti-rotation bracket to the back of the M3 using 3/8-16
screws and thread locker.
Remove screws from clamping collar, apply thread locker to screw
threads and reinstall. Place clamping collar loosely on the inboard
end of the shaft. Carefully slide M3 onto the shaft. DO NOT FORCE.
Encoder should slide on easily. After verifying M3 fit onto shaft, remove
M3, apply anti seize supplied to shaft and re-install M3 (see shaft
engagement).Tighten screws on clamping collar evenly until snug,
then firmly tighten. DO NOT USE A STANDARD RIGHT ANGLE WRENCH.
Use only a T-handle hex wrench or torque wrench with hex bit.
Secure free end anti-rotation bracket to frame. Use supplied insulating
hardware if necessary as shown. Adapter kits are available for NEMA
56C (A24492) and 8 1/2" (A24493) mounting faces.
Shaft Engagement
For end of shaft mounting applications:
See table on last page.
For shaft lengths greater than the maximum engagement allowed, end
of shaft mounting may still be employed by locating the encoder away
from the motor using a spacer between the motor and anti-rotation
bracket.
Corrective Action for Excess Housing Movement (Wobble)
The hollow shaft M3 design eliminates the potential for bearing and
coupling failures from misalignment, however, excessive housing
movement (wobble) may cause undesirable vibrations. The higher the
RPM, the more severe the vibration will be from housing movement.
In a typical installation a housing movement of 0.007" TIR or less (as
measured at the outside diameter of the main encoder body) will not
have an adverse effect. If excessive housing movement is detected in
the installation:
1) Check the shaft the M3 is mounted on for excessive shaft
runout. NEMA MG1 calls for 0.002" TIR or less.
2) Verify that the M3 engagement with the motor shaft conforms
to the engagement rules on page 4. In general, maximizing
engagement will minimize housing movement.
3) Verify that the mounting shaft diameters conform to the rules
on page 4. Excessive housing movement occurs when the
clearance between the motor shaft and pulse generator shaft
allows the two center lines to miss match.
4) Loosen the clamping collar and rotate the motor shaft 180°
within the M3 hollow shaft sleeve.
5) Make sure the clamping collar is tightened equally on both
sides.
6) Move the split in the clamping collar over a solid portion of
the M3 shaft.
If excessive housing movement still exists after the above steps, it
may be necessary to physically bias the attitude of the encoder on
the motor shaft while the clamping collar is being tightened. Either
by eye or using dial indicators, note the position around the outside
diameter of the encoder that is most out of position from true while
turning the motor shaft slowly. With the motor shaft no longer turning,
loosen the clamping collar. While applying moderate force by hand
against the outside diameter of the encoder on the side opposite
where the out of true position was observed, retighten the clamping
collar. Several iterations may be necessary if the first attempt under
or over compensates. This method may be used to help compensate
for undersized shafts, shaft runout, bent clamping fingers, and other
problems.
WIRING INSTRUCTIONS
CAUTION
Be sure to remove power before wiring the encoder.
Be sure to ground the cable shield: It can be connected
to case ground at the encoder, or grounded at the
receiving device, but should not be grounded on both
ends.
The M3 can be wired for single phase, two-phase, either with or
without complements, with or without markers and with or without
complementary divide by 4. See connector options and wiring
diagrams below.
ELECTRICAL
A. Operating Power (Vin)
1. Volts ......................................See Line Driver Options
2. Current ..................................120mA, no load
B. Output Format
1. 1O/ Connector Options H & J
2. 2O/ (A & B) ...............................Connector Options E & F
3. 2O/ & Comp. ............................Connector Options A,B,C,M,L,K,V,P,
(A,A–, B,B–)
...............................
N,T,W,X,& Z (differential line driver)
4. Marker ...................................All Options, 1/Rev, Gated with B low
@ and below 1200 PPR
5. ÷4 (C,C–) .................................Connector Options A,B,C,M,L,K,V,P,
N,T,W,X,& Z (differential line driver)
C. Signal Type ............................Incremental, Square Wave, 50 ±10%
Duty Cycle
D. Direction Sensing ..................O/ A leads O/ B for CW rotation as viewed
from the back of the tach looking at the
non-drive end of the motor.
E. Transition Sep. ......................15% minimum
F. Frequency Range ..................0 to 150,000 Hz.
G. PPR ........................................240, 256, 360, 480, 512, 600, 1024,
1200, 2048, 2500
H. See Line Driver Options
MECHANICAL
A. Shaft Inertia ..........................0.08 to 0.23 oz. In.
2
B. Acceleration ..........................5,000 RPM/Sec.
C. Speed ....................................5,000 RPM for all M3 models, except
those shown below
3,600 RPM for M3-6, M3-7, M3-D, M3-E,
M3-G, M3-H, M3-J
D. Weight ...................................6 lbs (2.7kg).
E. Starting Torque ......................1.5 to 20 oz. In.
F. Shaft Dia. Tolerance ..............See drawing on last page.
G. Shaft Engagement .................See drawing on last page.
ENVIRONMENTAL
A. Enclosure Rating ...................Sealed against dust and water ingress.
B. Operating Temp. ....................-20* to 85°C
*-40°C optional
LINE DRIVER OPTIONS
SPECIFICATIONS
Output Options
1
2
3
4
Voltage Input (Vin)
5-24 VDC
5-18 VDC
18-24 VDC
5-24 VDC
Output High (Volts)
(Vin) -2 (typ)
(Vin) -1 (typ)
330 ohm
pull up
5 VDC
Output High
(milliamps)
80 (max.)
80 (avg.),
1500 (peak)
330 ohm
pull up
80 (max.)
Output Low (Volts)
0.5 (typ)
0.5 (typ)
1 (max.)
0.5 (typ)
Output Low
(milliamps)
80 (max.)
80 (avg.),
1500 (peak)
50 (avg.)
80 (max.)
Protection
Reverse Voltage,
Transient,
Short Circuit (high
& low)
Reverse Voltage,
Transient,
Short Circuit (none)
Reverse Voltage,
Transient,
Short Circuit (low)
Reverse Voltage,
Transient,
Short Circuit (high
& low)
Maximum Cable
Drive(Feet)
1000 ft. @ 5 V
500 ft. @ 12 V
200 ft. @ 24 V
2000 ft.
1000 ft.
1000 ft. @ 5 V